Manual Pages for UNIX Operating System command usage for man scsi_poll

Kernel Functions for Drivers                        scsi_poll(9F)



NAME
     scsi_poll - run a polled SCSI command on behalf of a  target
     driver

SYNOPSIS
     #include 



     int scsi_poll(struct scsi_pkt *pkt);


INTERFACE LEVEL
     Solaris DDI specific (Solaris DDI).

PARAMETERS
     pkt    Pointer to the scsi_pkt(9S) structure.


DESCRIPTION
     The scsi_poll() function requests the host adapter driver to
     run  a  polled command. Unlike scsi_transport(9F) which runs
     commands asynchronously, scsi_poll() runs commands  to  com-
     pletion  before  returning. If the pkt_time member of pkt is
     0, the value of  pkt_time is defaulted to  SCSI_POLL_TIMEOUT
     to prevent an indefinite hang of the system.

RETURN VALUES
     The scsi_poll() function returns:

     0     command completed successfully.


     -1    command failed.


CONTEXT
     The scsi_poll() function can be called from user, interrupt,
     or  kernel  context. This function should not be called when
     the caller is executing timeout(9F)  in  the  context  of  a
     thread.

SEE ALSO
     makecom(9F), scsi_transport(9F), scsi_pkt(9S)


     Writing Device Drivers

WARNINGS
     Since scsi_poll() runs commands to completion before return-
     ing,  it may require more time than is desirable when called
     from interrupt context.  Therefore, calling  scsi_poll  from



SunOS 5.11          Last change: 16 Jan 2006                    1






Kernel Functions for Drivers                        scsi_poll(9F)



     interrupt context is not recommended.






















































SunOS 5.11          Last change: 16 Jan 2006                    2